diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index 1474624..887f8ee 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -3801,6 +3801,7 @@ class _TestSharedMemory(BaseTestCase):
         sms.close()

     @unittest.skipIf(os.name != "posix", "not feasible in non-posix platforms")
+    @unittest.skipUnless(sys.stdin.isatty(), "KeyboardInterrupts require a TTY device")
     def test_shared_memory_SharedMemoryServer_ignores_sigint(self):
         # bpo-36368: protect SharedMemoryManager server process from
         # KeyboardInterrupt signals.
diff --git a/Lib/test/test_signal.py b/Lib/test/test_signal.py
index d41e94b..a1c15e7 100644
--- a/Lib/test/test_signal.py
+++ b/Lib/test/test_signal.py
@@ -78,6 +78,7 @@ class PosixTests(unittest.TestCase):
         self.assertLess(len(s), signal.NSIG)

     @unittest.skipUnless(sys.executable, "sys.executable required.")
+    @unittest.skipUnless(sys.stdin.isatty(), "KeyboardInterrupts require a TTY device")
     def test_keyboard_interrupt_exit_code(self):
         """KeyboardInterrupt triggers exit via SIGINT."""
         process = subprocess.run(
@@ -128,6 +129,7 @@ class WindowsSignalTests(unittest.TestCase):
             signal.signal(7, handler)

     @unittest.skipUnless(sys.executable, "sys.executable required.")
+    @unittest.skipUnless(sys.stdin.isatty(), "KeyboardInterrupts require a TTY device")
     def test_keyboard_interrupt_exit_code(self):
         """KeyboardInterrupt triggers an exit using STATUS_CONTROL_C_EXIT."""
         # We don't test via os.kill(os.getpid(), signal.CTRL_C_EVENT) here
@@ -1245,6 +1247,7 @@ class StressTest(unittest.TestCase):

 class RaiseSignalTest(unittest.TestCase):

+    @unittest.skipUnless(sys.stdin.isatty(), "KeyboardInterrupts require a TTY device")
     def test_sigint(self):
         with self.assertRaises(KeyboardInterrupt):
             signal.raise_signal(signal.SIGINT)
--
2.23.0
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=3d2e2bf6b85b5d54e331b8572050a395be87d134'>root</a>/<a href='/guix/log/gnu?id=3d2e2bf6b85b5d54e331b8572050a395be87d134'>gnu</a>/<a href='/guix/log/gnu/services?id=3d2e2bf6b85b5d54e331b8572050a395be87d134'>services</a>/<a href='/guix/log/gnu/services/herd.scm?id=3d2e2bf6b85b5d54e331b8572050a395be87d134'>herd.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/herd.scm?id=3d2e2bf6b85b5d54e331b8572050a395be87d134&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-03-03 15:00:32 +0100'>2020-03-03</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=8f5a0a97b1d04e8ade8c16694dcb72aed176c595'>services: herd: Add restart-service.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2019-10-18 23:22:25 +0200'>2019-10-18</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=6aeae5b90b9513d316141c0131fd43c76a200f63'>herd: Define 'shepherd-message-port'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-26 19:19:49 +0200'>2019-07-26</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=5c793753b31b1dcd9a554bce953124f7ae88ca9a'>guix system: Add 'reconfigure' module.</a><span class='msg-avail'>...</span></td><td>Jakob L. Kreuze</td></tr>
<tr><td><span title='2019-06-02 01:38:36 +0200'>2019-06-02</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=bb64b2e7c0ab14cf899c1d81892b59fa877d4d9c'>herd: Use the Guile 2.2 'setvbuf' API.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>